TM 10-3930-664-24 16. Remove  elbows  (31,  32)  from  priority  valve  (30)  if replacement  is  required.      Remove  and  discard  O- rings (33, 34). 17. Remove fitting (35), elbow (36), and fitting (37) from steering    selector    valve    (8)    if    replacement        is required.     Remove   and discard O-rings (38, 39). B. CLEANING Clean    hoses,    lines,    and    fittings    in    accordance    with paragraph 1-24. C. INSPECTION Inspect  hoses,  lines,  fittings,  and  related components in accordance with paragraph 1-24. D. INSTALLATION 1. Install  fitting  (35),  elbow  (36),  fitting  (37),  and  new O-rings   (38,   39)   into   steering   selector   valve   (8). Ensure proper orientation. 2. Install elbows (31, 32) and new O-ring (33, 34) into priority valve (30).   Ensure proper orientation. 2-322